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<div style="display: none; max-height: 0px; overflow: hidden;">Xcode 26.3 introduces agentic coding, allowing developers to integrate AI agents directly into their app development workflow </div>
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<h1><strong> TLDR Dev <span id="date">2026-02-04</span></strong></h1>
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<strong>Deep Dive: How Claude Code's /insights Command Works (14 minute read)</strong>
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The `/insights` command in Claude Code generates an HTML report that analyzes users' interaction patterns across all their sessions. This process involves filtering session logs, extracting metadata, and using an LLM to perform qualitative "facet extraction" on session transcripts. The aggregated data and LLM insights then identify interaction styles, successful workflows, and friction points, and proposes actionable suggestions.
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<strong>Subagents: When and How to Use Them (10 minute read)</strong>
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Subagents are specialist agents that your main AI agent can spawn to handle focused tasks in their own clean context, keeping your main conversation readable instead of cluttered with noise. The two useful patterns are chaining them sequentially (like scout files → implement → verify) or running them in parallel for exploration.
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<strong>7 Slack hacks for engineers and managers (7 minute read)</strong>
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To improve productivity when using Slack or Teams, organize channels into priority-based categories (read now/daily/weekly), mute lower-priority groups until scheduled check-ins, and use message reminders instead of leaving things unread.
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<strong>I left FAANG for a startup and regretted it (7 minute read)</strong>
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A dev left Amazon for a $300K startup in SF and got let go after 3 weeks when he admitted he didn't actually like the work. Startups need obsession and not just talent, and he wasn't willing to sacrifice everything for someone else's vision.
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<strong>What, then, are we paying for? (2 minute read)</strong>
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Despite AI making it easier to build custom solutions, the true value of buying software lies in paying another entity to own and continually maintain a specific problem domain, freeing the buyer from that ongoing responsibility.
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<strong>Xcode 26.3 unlocks the power of agentic coding (6 minute read)</strong>
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Xcode 26.3 introduces agentic coding, allowing developers to integrate AI agents directly into their app development workflow. This new capability enables agents like Anthropic's Claude Agent and OpenAI's Codex to autonomously tackle complex tasks, interact with project architecture, and visually verify their work.
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<strong>Introducing Deno Sandbox (4 minute read)</strong>
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Deno Sandbox is a new platform designed to securely run untrusted code, especially LLM-generated code, that frequently calls external APIs with sensitive credentials. It provides lightweight Linux microVMs with defense-in-depth security with features like granular network egress control and a unique mechanism that protects secrets from exfiltration by only materializing them during approved outbound requests.
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Vercel's v0 now allows users to work directly on existing codebases, integrates Git workflows for entire teams, has secure database connections, and guarantees enterprise-grade security by default.
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A former software engineer ventured into hardware by launching "Brighter," a powerful lamp, after a successful crowdfunding campaign. He immediately faced numerous challenges, including prototype brightness issues, unexpected tariff hikes, manufacturing errors with parts like heatsinks and knobs, and quality control problems with wiring and accessories. Despite these hurdles, the team iteratively fixed problems, produced the 500 units, and delivered them to customers.
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